Aspirator



Jan. 10, 1933. R H 2|NK|L ET AL 1,893,724

ASPIRATOR,

Filed July 14, 1950 jigs.

Patented .lanQ lil, 1933 UNITED STATS PATENT oFFIcE ROY H. ZINKIL, OFCHICAGO, AND LOUIS IB. STINE, OF NILES CENTER, ILLINOIS, ASSIGNOR-S TOCRANE CO., OF C-IICAGO, ILLINCIS, A CORPORATION GF ILLINOIS ASPIRATORApplication filed July 14,

This invention relates to aspirators and similar suction devices andmore particularly to those which are adapted to be used in hospitals,dental clinics or the like.

Aspirators of this type usually utilize the How of water through aVenturi tube to create a suction or partial vacuum in a suction tube,the latter being extended to remove iiuids from some remote point.Previous devices of this character, however, were usually cumbersomemakeshift-s which did not properly dispose ofthe fluid picked up by theaspirator in such a manner as to prevent back-siphoning thereof from thewaste tube and/or suction tube into the fresh water supply, nor werethey constructed to permit proper cleansing thereof.

In accordance with this invention a unitary structure is provided whichemploys a suction tube connected to a form of a Venturi tube to producethe necessary suction. The aspirator has embodied Jtherein a suitabledrainage connection for disposing of the material picked up through themedium of the suction, which drainage means is constructed to eliminateany possibility of back-siphoning into the supply line from either thedrainage pipe or suction tube and is constructed to permit thoroughcleansing thereof.

A better understanding will be had of this invention from aconsideration of the following description given in connection with thedrawing, in which:

Fig. 1 is a side elevation partly in section of an aspirator constructedin accordance with this invention, and

Fig. 2 is a section on line 2 2 of Fig. 1.

rlhe flow of water for creating the suction is taken from the usualsupply line 1 controlled by valve 2 to which is connected a Venturi tube8. rlhe Venturi tube is tapped just ahead of the restricted portion ofthe tube to provide for a connection such as a nipple 6. A suitable hose7 and nozzle 8 may be coupled to the nipple 6, the lat-ter twoconstituting a suction or aspirating line to be extended to any desiredpoint.

To the lower end of the Venturi tube 3 is attached a discharge tube 9which leads into a waste connection or tube 11 of greater diam- 1930.Serial No. 467,709.

eter than said Venturi tube and said discharge tube, the waste tube alsobeing connected to the lower end of the Venturi tube by means of aspider 12 and a union connection 13. The arms of the spider are spacedsutiiciently apart to permit an operator to reach therebetween to closethe lower end of the tube 9 with hisiinger or a suitable implement, inorder to flush the pipe nipple, hose and nozzle at such intervals whenso desiree. The lower end of waste tube 11 is Connected through areducer 14 and union joint 15 to a trap 16 leading to a suitabledrainage pipe 17. The waste tube may, of course, discharge directly intoan open fixture.

From the above it is apparent that a suction will be created at thenozzle 8 through the action of the Venturi tube, which nozzle may bepositioned at any suitable place to remove a iluid which will be drawnup through the nozzle 8, hose 7, and discharged downwardly through thelower end of the Venturi tube 3 passing through tube 9 into the wastetube 11. The hose 7 may also be attached to suitable antisepticcontainers (not shown) in order to minimize possibilities of infection,due to the nature of the iiuids or discharge materials handled or forconvenience in analyzing the discharge fluids.

The openings between the arms of the spioer will permit the insertion ofcleansing devices into the waste connection to cleanse the sides thereofand also permitl an operator to insert his ting-er or a suit-ableimplement therein to close off the opening of tube 9. Such a closurewill cause a strong stream of water to iiow out of nozzle 8 which mayalso be inserted between the arms of the spider to flush and wash outthe waste tube 11. Because of the simplicity and convenience of theconnections 13 and 15, it is also evident that the waste tube 11 andreducer 11i may be easily removed for purpose of cleansability and/orsterilization.

The possibility of back-Siphonage, ordinarily possible in devices 4ofthis character, due to the clogging up of the outlet or dischargeconduit 11, is prevented. Prevention of this condition eliminates allpossibility of contamination of the supply line, which is a seriousmenace, particularly in hospitals Where contagion might become rampant.It Will b-e noted that the lowest point of the tube 9 is above thehighest possible Water level attainable in the discharge oriice andunion connection 13. In other Words, in having the discharge tube 9above the opening of the spider 12, an air gap, so to speak, is formed,preventing a Water seal and b-ack-siphonage into the supply system Jfromeither the Waste or suction tube since no vacuum or seal can possibly beformed.

From the above it is seen that the aspirator may be readily cleansed andis of a simple unitary construction.

It is obvious that many changes may be made in the details ofconstruction Without departing from the spirit and scope of theinvention as defined by the claims appended hereto.

We claim:

1. In an aspirator, a suction tube, means for creating a suctiontherein, Waste tube into which the suction tube discharges, a connectingmember joining the suction tube to said Waste tube, said connectingmember having spaced arms intermediate its ends and above the upper endot said Waste tube Whereby air is admitted to said Waste tube at a pointabove any possible fluid level therein and the discharge of said end ottsaid tube being disposed above any possible fluid level in said Wastetube to prevent bacli-siphonage into said suction means When said Wastetube` becomes clogged.

2. In an aspirator, a suction tube, means for creating a suction thereincomprising a venturi adapted to be connected to a Water supply pipe, aWaste tube connected to said suction means so as to receive thedischarge from said suction tube at a point removed from said venturiand above any possible uid level in said Waste tube, and means forventing the aspirator to the atmosphere to prevent a liquid seal andprevent backsiphonage into the Water supply pipe in the case of failureof pressure therein.

In Witness of the foregoing We affix our signatures.

ROY II. ZINKIL. LOUIS B. STINE.

